Patents by Inventor Lianhe Yu

Lianhe Yu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8618281
    Abstract: A method of making a compound of Formula I? comprises reacting a compound of the formula DLCHO, with a compound of the formula to produce the compound of Formula I?. Methods of using the compounds are also described, particularly as intermediates for the synthesis of porphyrin rods, which porphyrin rods are in turn useful for (among other things) the production of molecular memory devices.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: December 31, 2013
    Assignee: North Carolina State University
    Inventors: Jonathan S. Lindsey, Lianhe Yu, Patchanita Thamyongkit, Anil D. Bhise
  • Publication number: 20130079528
    Abstract: A method of making a compound of Formula I? comprises reacting a compound of the formula DLCHO, with a compound of the formula to produce the compound of Formula I?. Methods of using the compounds are also described, particularly as intermediates for the synthesis of porphyrin rods, which porphyrin rods are in turn useful for (among other things) the production of molecular memory devices.
    Type: Application
    Filed: August 31, 2012
    Publication date: March 28, 2013
    Inventors: Jonathan S. Lindsey, Lianhe Yu, Patchanita Thamyongkit, Anil D. Bhise
  • Patent number: 8288529
    Abstract: A method of making a compound of Formula I? comprises reacting a compound of the formula DLCHO, with a compound of the formula to produce the compound of Formula I?. Methods of using the compounds are also described, particularly as intermediates for the synthesis of porphyrin rods, which porphyrin rods are in turn useful for (among other things) the production of molecular memory devices.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: October 16, 2012
    Assignee: North Carolina State University
    Inventors: Jonathan S. Lindsey, Lianhe Yu, Patchanita Thamyongkit, Anil D. Bhise
  • Publication number: 20120126214
    Abstract: The present invention provides dipyrrin substituted porphyrinic macrocycles, intermediates useful for making the same, and methods of making the same. Such compounds may be used for purposes including the making of molecular memory devices, solar cells and light harvesting arrays.
    Type: Application
    Filed: January 27, 2012
    Publication date: May 24, 2012
    Inventors: Lianhe Yu, Kannan Muthukumaran, Prathapan Sreedharan, Jonathan S. Lindsey
  • Patent number: 8129520
    Abstract: The present invention provides dipyrrin substituted porphyrinic macrocycles, intermediates useful for making the same, and methods of making the same. Such compounds may be used for purposes including the making of molecular memory devices, solar cells and light harvesting arrays.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: March 6, 2012
    Assignee: North Carolina State University
    Inventors: Lianhe Yu, Kannan Muthukumaran, Prathapan Sreedharan, Jonathan S. Lindsey
  • Publication number: 20110197969
    Abstract: The present invention provides dipyrrin substituted porphyrinic macrocycles, intermediates useful for making the same, and methods of making the same. Such compounds may be used for purposes including the making of molecular memory devices, solar cells and light harvesting arrays.
    Type: Application
    Filed: April 14, 2011
    Publication date: August 18, 2011
    Inventors: Lianhe Yu, Kannan Muthukumaran, Prathapan Sreedharan, Jonathan S. Lindsey
  • Publication number: 20110184166
    Abstract: A method of making a compound of Formula I? comprises reacting a compound of the formula DLCHO, with a compound of the formula to produce the compound of Formula I?. Methods of using the compounds are also described, particularly as intermediates for the synthesis of porphyrin rods, which porphyrin rods are in turn useful for (among other things) the production of molecular memory devices.
    Type: Application
    Filed: March 29, 2011
    Publication date: July 28, 2011
    Inventors: Jonathan S. Lindsey, Lianhe Yu, Patchanita Thamyongkit, Anil D. Bhise
  • Patent number: 7947828
    Abstract: The present invention provides dipyrrin substituted porphyrinic macrocycles, intermediates useful for making the same, and methods of making the same. Such compounds may be used for purposes including the making of molecular memory devices, solar cells and light harvesting arrays.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: May 24, 2011
    Assignee: North Carolina State University
    Inventors: Lianhe Yu, Kannan Muthukumaran, Prathapan Sreedharan, Jonathan S. Lindsey
  • Patent number: 7939656
    Abstract: A method of making a compound of Formula I? comprises reacting a compound of the formula DLCHO, with a compound of the formula to produce the compound of Formula I?. Methods of using the compounds are also described, particularly as intermediates for the synthesis of porphyrin rods, which porphyrin rods are in turn useful for (among other things) the production of molecular memory devices.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: May 10, 2011
    Assignee: North Carolina State University
    Inventors: Jonathan S. Lindsey, Lianhe Yu, Patchanita Thamyongkit, Anil D. Bhise
  • Publication number: 20100305314
    Abstract: A method of making a compound of Formula I? comprises reacting a compound of the formula DLCHO, with a compound of the formula to produce the compound of Formula I?. Methods of using the compounds are also described, particularly as intermediates for the synthesis of porphyrin rods, which porphyrin rods are in turn useful for (among other things) the production of molecular memory devices.
    Type: Application
    Filed: August 13, 2010
    Publication date: December 2, 2010
    Inventors: Jonathan S. Lindsey, Lianhe Yu, Patchanita Thamyongkit, Anil D. Bhise
  • Patent number: 7799910
    Abstract: A method of making a compound of Formula I? comprises reacting a compound of the formula DLCHO, with a compound of the formula to produce the compound of Formula I?. Methods of using the compounds are also described, particularly as intermediates for the synthesis of porphyrin rods, which porphyrin rods are in turn useful for (among other things) the production of molecular memory devices.
    Type: Grant
    Filed: January 3, 2006
    Date of Patent: September 21, 2010
    Assignee: North Carolina State University
    Inventors: Jonathan S. Lindsey, Lianhe Yu, Patchanita Thamyongkit, Anil D. Bhise
  • Publication number: 20100200066
    Abstract: The present invention provides dipyrrin substituted porphyrinic macrocycles, intermediates useful for making the same, and methods of making the same. Such compounds may be used for purposes including the making of molecular memory devices, solar cells and light harvesting arrays.
    Type: Application
    Filed: April 8, 2010
    Publication date: August 12, 2010
    Inventors: Lianhe Yu, Kannan Muthukumaran, Prathapan Sreedharan, Jonathan S. Lindsey
  • Patent number: 7723513
    Abstract: The present invention provides dipyrrin substituted porphyrinic macrocycles, intermediates useful for making the same, and methods of making the same. Such compounds may be used for purposes including the making of molecular memory devices, solar cells and light harvesting arrays.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: May 25, 2010
    Assignee: North Carolina State University
    Inventors: Lianhe Yu, Kannan Muthukumaran, Prathapan Sreedharan, Jonathan S. Lindsey
  • Patent number: 7332599
    Abstract: The present invention provides dipyrrin substituted porphyrinic macrocycles, intermediates useful for making the same, and methods of making the same. Such compounds may be used for purposes including the making of molecular memory devices, solar cells and light harvesting arrays.
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: February 19, 2008
    Assignee: North Carolina State University
    Inventors: Lianhe Yu, Kannan Muthukumaran, Prathapan Sreedharan, Jonathan S. Lindsey
  • Publication number: 20070191600
    Abstract: The present invention provides dipyrrin substituted porphyrinic macrocycles, intermediates useful for making the same, and methods of making the same. Such compounds may be used for purposes including the making of molecular memory devices, solar cells and light harvesting arrays.
    Type: Application
    Filed: April 20, 2007
    Publication date: August 16, 2007
    Applicant: North Carolina State University
    Inventors: Lianhe Yu, Kannan Muthukumaran, Prathapan Sreedharan, Jonathan Lindsey
  • Publication number: 20070155963
    Abstract: A method of making a compound of Formula I? comprises reacting a compound of the formula DLCHO, with a compound of the formula to produce the compound of Formula I?. Methods of using the compounds are also described, particularly as intermediates for the synthesis of porphyrin rods, which porphyrin rods are in turn useful for (among other things) the production of molecular memory devices.
    Type: Application
    Filed: January 3, 2006
    Publication date: July 5, 2007
    Inventors: Jonathan Lindsey, Lianhe Yu, Patchanita Thamyongkit, Anil Bhise
  • Patent number: 6924375
    Abstract: The present invention provides a method of making a metal complex. The method comprises the steps of: (a) acylating a dipyrromethane or a 1-monoacyldipyrromethane to form a mixed reaction product comprising a 1,9-diacyidipyrromethane; (b) combining the reaction product with a compound of the formula R2MX2 in the presence of a base, where R is alkyl or aryl, M is Sn, Si, Ge, or Pb (preferably Sn), and X is halo, OAc, acac, or OTf, to form a product comprising a metal complex of the formula DMR2 in the mixed reaction product, wherein D is a 1,9-diacyldipyrromethane; and then (c) separating the metal complex from the mixed reaction product. The method may be utilized for the convenient synthesis and separation of 1,9-diacyldipyrromethanes. Metal complex intermediates useful in such methods are also described.
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: August 2, 2005
    Assignee: North Carolina State University
    Inventors: Jonathan S. Lindsey, Shun-Ichi Tamaru, Lianhe Yu
  • Publication number: 20050054858
    Abstract: The present invention provides a method of making a metal complex. The method comprises the steps of: (a) acylating a dipyrromethane or a 1-monoacyldipyrromethane to form a mixed reaction product comprising a 1,9-diacyidipyrromethane; (b) combining the reaction product with a compound of the formula R2 MX2 in the presence of a base, where R is alkyl or aryl, M is Sn, Si, Ge, or Pb (preferably Sn), and X is halo, OAc, acac, or OTf, to form a product comprising a metal complex of the formula DMR2 in the mixed reaction product, wherein D is a 1,9-diacyldipyrromethane; and then (c) separating the metal complex from the mixed reaction product. The method may be utilized for the convenient synthesis and separation of 1,9-diacyldipyrromethanes. Metal complex intermediates useful in such methods are also described.
    Type: Application
    Filed: September 3, 2003
    Publication date: March 10, 2005
    Inventors: Jonathan Lindsey, Shun-Ichi Tamaru, Lianhe Yu
  • Patent number: 6849730
    Abstract: The present invention provides methods of making porphyrins and related compounds such as chlorins by condensing suitable starting materials (e.g., a dipyrromethane-dicarbinol plus dipyrromethane) in a polar solvent in the presence of a Lewis acid. The reactions are preferably carried out in a manner that minimizes rearrangement of the reaction product.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: February 1, 2005
    Assignee: North Carolina State University
    Inventors: Jonathan S. Lindsey, G. Richard Geier, III, Lianhe Yu
  • Publication number: 20040254383
    Abstract: The present invention provides dipyrrin substituted porphyrinic macrocycles, intermediates useful for making the same, and methods of making the same. Such compounds may be used for purposes including the making of molecular memory devices, solar cells and light harvesting arrays.
    Type: Application
    Filed: June 6, 2003
    Publication date: December 16, 2004
    Inventors: Lianhe Yu, Kannan Muthukumaran, Prathapan Sreedharan, Jonathan S. Lindsey